Seeming you ovulated on the Tuesday, I am thinking it is more likely to be your husbands but you can never be too sure with these things.

Its a big gamble and I think you may need to have a talk about this with him. Does your GP know your circumstances? What if you cant find out the baby's DNA until it is to late? Also how are you going to get your husbands DNA? Or are you going to get the other guy's tested to rule him out?

Sorry you are going through this. Even though you know you made a mistake and regret it 1000 times over, it still must be incredibly stressful.